Fulcrum for the weight-levers for the rolls of spinning-frames



(N0 Model.)

W. DRISOOLL & J. F. BOYLEN.

FULGRUM FOR THE WEIGHT LEVBRS FOR THE ROLLS 0F SPINNING FRAMES. No. 381,681. PatentedApr. 24, 1888.

Witnssas, jwyantara M/ f'flrwoazL and 3% day.

UNlTED STATES PATENT (Enrica WVILLIAM DRISCOLL AND JAMES FRANCIS BOYLEN, OF TAUNTON, AS-

SIGNORS OF ONE-HALF TO GEORGE DRAPER & SONS, OF HOPEDALE,

MASSACHUSETTS.

FULCRUM FOR THE WElGHT-LEVERS FOR THE ROLLS OF SPINNING-FRAMES.

SFECIPICATION forming part of Letters Patent No. 381,681, dated April 24, 1888.

Application filed January 7, 1888.

To aJZ whom, it may concern.-

Be it known that we, WILLIAM DnrsooLL and James Farmers BOYLEN, of Taunton, county of Bristol, and State of Massachusetts, have invented an Improved Fulcrum for the \Veighted Levers for the Rolls of Spinning- Machincs, of which the following description, in connection with the accompanying drawings, is a specification, likeletters on the drawings representing like parts.

Our invention relates to the fulcrum for the weightedleveremploycdinspimiing-niachines to produce the required pressure on the drawing-rolls, the said pressure being transmitted from the lever by a stirrup to the saddles, that rest on the top rolls in the usual manner.

The object of the invention is to provide a fulcru m'piece of inexpensive construction that is simple and durable and easily adjustable for the purposeofln'ingingtheleverintotheproper position without disengaging the lever from the fulcrum or stirrup. The fulcruinpieces have heretofore consisted of a screw or bolt the lower end of which turns into a threaded opening in the top board of the spinning franie, and in some cases the said bolt has been made in two parts, the upper part, that engages the lever, being swiveled to the lower part, that screws into the top board, so that the lower part can be turned in or out in the socket in the top board for the purpose of adjusting the position of the upper part without disengaging the latter from the lever. I

In the present invention the fulcrum is connected by a screw-thread with a supportingpiece which is engaged with the top board, but not adjustable therein and not necessarily movable with relation to the top board, and the adjustment of the fulcrum is effected by the longitudinal movement of the fulcrumpiece with relation to the said threaded piece that is engaged with the top board, which movement is effected by rotating one of the said parts with relation to the other. In other words, in the present device the fulcrum'piece is adjustable on the support connected with the top board, which support is notadjustable with relation to the top board itself, while in devices heretofore used the entire fulcrum or Serial No, 260,081. (No model.)

support of the lever has been adjustable in the top board itself.

The invention is shown embodied in a fulcrum or support for the lever, consisting of a nut turning on the threaded end of a rod or belt which passes through an opening in the top board, and the end of the said bolt is shown as provided with a recess that receives the end of the lever, and the under portion of the nut or fulcrum proper is provided with an annular Vshaped ridge which engages a notch in the lever and constitutes the bearing therefor.

Figure l is a vertical section of aport-ion of a. spinning-frame provided with this invention, the weighted lever and its fulcrum being shown in elevation; Fig. 2, a rear elevation of the part that supports the adjustable fulcrum; Fig. 3, a side elevation, partly in longitudinal section, of the adjustable fulcrum and its support; and Fig. 4, afront elevation ofa fulcrumsupport of a modified construction.

The top board, a, top and bottom rolls, 2) c, saddles d, stirrup e, lever f, and weight g, the pressure of which is transmitted through the lever f, stirrup e, and saddles cl to the top rolls, may all be of usual construction.

The short arm ofthe leverf rests upoua fulcrum, it, connected with a support, t, engaged with the top board, a, but having no longitudinal adjustment with relation thereto, as is the case with the fulcrum-supports heretofore commonly used in spinning-machines.

The position of the lever f tends to change as the bearing-surfaces of the rolls and saddles wear, and in order to compensate for such wear and to restore the lever f to the proper position the entire fulcrum-support has heretofore been adjustable in the top board, a, the said support having been made as a screw turn ing in a threaded opening in the top board, a.

In the present invention the adjustment of the lever f is provided for by the movement of the fulcrum h on its support i, the said fulcrum and support being connected byascrewthread, so that the rotation of one with relation to the other produces a longitudinal movement of the fulcrum with relatien'to its support, and thereby adjusts the height of said fulcrum above the top board, a,

In the construction illustrated in Figs. 1 to 3 the support i is a bolt passing through a smooth or unthreaded opening in the top having an annular V-shaped projection, h, on.

its under side, which engages the short arm of the lever, as shown in Fig. 3.

The support 1' is provided with a recess that receives the short arm of the lever. The said recess may be made by milling into one side of the shank of the bolt, as shown in Figs. 2 and 3, or by slotting or cutting wholly through the bolt, as shown in Fig. 4.

The adjustment of the fulcrum and consequent position of the leverf may be effected with any degree of nicety by rotating the fulcrum with relation to its support, as will be readily understood. By having the adjust ment effected by the movement ofone part of the lever-support with relation to the other part, as herein shown, the said parts may be carefully constructed and hardened, and thus rendered very durable, and the entire leversupport may be easily replaced, if required, while if the adjustment is effected by the turning of a screw in a threaded passage in the top boardand the thread should become worn or be stripped the defect can be remedied only by tapping a new thread in the top board and using a bolt or screw of largersize.

The support z may be provided with a head, engaging the under side of the top board, as shown in Fig. 1, or it may be connected with the top board in any other suitable manneras, for example, by screwing it into a threaded socket in the top board, in which case the lower end of the bolt will have nohead, but will be threaded, as shown at Fig. 4. This thread, however, in this construction is not depended upon for adjustment, and whenthe bolt is once screwed in place in the top board it will remain, so that there is no wear on the threads, as is the case when the leversupport is adjusted by the screw-thread in the top board.

The invention is not limited to the specific construction shown, as itcan be modified without departing from the principle of operation set forth, the essential feature of the invention being that the fulcrum is adjustable on its support instead of the said support being adjustable in the top board.

We claiml. The combination of the weighted lever for the rolls of a spinning-frame with a support connected with the top board and a fulcrum longitudinally adjustable with relation to said. support, substantially as and for the purpose described. A

2. The combination of a supporting-bolt threaded at one end and provided with a recess in said threaded portion with a nut cooperating with said threaded portion and provided with an annular V-shaped projection at one end, substantially as and for the purpose described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

VVILL IAM DRISCOLL. JAMES FRANCIS BOYLEN.

\Vitnesses:

EVERETT THOMAS WETHERELL, J OHN CHARLES CLARKE. 

